<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <!-- 当鼠标离开时，需要隐藏，测试后发现给父元素绑定离开事件 -->
      <div class="nav-left" @mouseleave="showCategoryList = false">
        <!-- 当鼠标进入h2元素时需要显示，所以绑定鼠标事件 -->
        <h2 class="all" @mouseenter="showCategoryList = true">全部商品分类</h2>
        <!-- 组件复用时，结构也会影响其他组件，所以需要进进行路径判断 -->
        <div class="sort" v-show="$route.path === '/home' || showCategoryList">
          <div class="all-sort-list2" @click="toSearch">
            <div
              class="item"
              v-for="item1 in categoryList"
              :key="item1.categoryId"
            >
              <h3>
                <a
                  :data-id="item1.categoryId"
                  :data-name="item1.categoryName"
                  :data-level="1"
                  >{{ item1.categoryName }}</a
                >
              </h3>
              <div class="item-list clearfix">
                <div class="subitem">
                  <dl
                    class="fore"
                    v-for="item2 in item1.categoryChild"
                    :key="item2.categoryId"
                  >
                    <dt>
                      <a
                        :data-id="item2.categoryId"
                        :data-name="item2.categoryName"
                        :data-level="2"
                        >{{ item2.categoryName }}</a
                      >
                    </dt>
                    <dd>
                      <em
                        v-for="item3 in item2.categoryChild"
                        :key="item3.categoryChild"
                      >
                        <a
                          :data-id="item3.categoryId"
                          :data-name="item3.categoryName"
                          :data-level="3"
                          >{{ item3.categoryName }}</a
                        >
                      </em>
                    </dd>
                  </dl>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
import { reqGetCategoryList } from "@/api/axios/home";
export default {
  name: "TypeNav",
  async mounted() {
    const result = await reqGetCategoryList();
    // console.log(result);
    this.categoryList = result;
  },
  data() {
    return {
      categoryList: [],
      showCategoryList: false,
    };
  },
  methods: {
    toSearch(e) {
      // console.log(e.target.dataset);
      // console.log(e.target.dataset.id); //没点到DOM元素上就是undefined

      // if (!e.target.dataset.id) return;

      const { id, name, level } = e.target.dataset;
      if (!level) return;

      this.$router.push({
        name: "Search",
        query: {
          ...this.$route.query,//拼接在当前接收的所有参数
          [`category${level}Id`]: id,
          categoryName: name,
        },
      });
    },
  },
};
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        overflow: hidden;
        height: 456px;
        a {
          cursor: pointer;
          text-decoration: none;
        }
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;

            margin: 0;

            a {
              display: block;
              padding: 0 20px;
              height: 100%;
              color: #333;
            }
          }
          h3:hover {
            background-color: #e1251b;
            a {
              color: #f7f7f7;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;

            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>
